// Copyright 2007-2010 Comdiv (F. Sadykov) - http://code.google.com/u/fagim.sadykov/
// Supported by Media Technology LTD 
//  
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//  
//      http://www.apache.org/licenses/LICENSE-2.0
//  
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// 
// MODIFICATIONS HAVE BEEN MADE TO THIS FILE
using System.IO;
using System.Xml.Xsl;
using Comdiv.Extensions;
using Comdiv.IO;

namespace Comdiv.Patching{
    public class XsltTask : IPackageInstallTask{
        public XsltTask(XslCompiledTransform transformation, string file){
            Transformation = transformation;
            TargetFile = file;
            Name = "xslt";
        }

        public string TargetFile { get; set; }

        public XslCompiledTransform Transformation { get; set; }

        #region IPackageInstallTask Members

        public string Name { get; set; }

        public IPackageInstallResult Do(IPackage package, IFilePathResolver target){
            foreach (var file in TargetFile.split()){
                if (target.Exists(file)){
                    var oldcontent = target.Read(file).asXPathNavigable();
                    var writer = new StringWriter();
                    // var args = XsltStandardExtension.PrepareArgs();
                    Transformation.Transform(oldcontent, new XsltArgumentList(), writer);
                    writer.Flush();
                    target.Write(file, writer.ToString());
                }
            }

            return new DefaultPackageInstallResult{State = ResultState.OK};
        }

        #endregion
    }
}